Doffing tool



Jan. 15, 1957 K. M. SCHMlDT DOFFING TOOL Filed June 6, 1952 FIG 'INVENTOR KNUTE M. SCHMIDT @yx LA? TTORNEYS United. States Patent DOFFDIG TOOL Knute M. SchmidgElizabethtomTenm assignor to North Ameriean Rayon- Corporation, New-York, N. Y., a corporation of. Delaware Application June6,'1952',SeriaINo. 2922167 6 Claims. (Cl. 294-25) The present invention relates to a tool for doffing spinning spools. More particularly the invention is concerned with a tool adapted for dotfing extra long rayon spinnings spools having large packages of wet rayon yarn disposed thereon.

A number of tools and devices are known for lifting cakes of yarn from centrifugal spinning buckets which in the main comprise at least one element or elements integrally associated with the spinning bucket. Also hand manipulated dofling tools are presently being used with the relatively short spinning spools more commonly employed in spinning operation. The existing dofling tools, due to the nature of theirdesign, are considered to be unsuitable for use in connection with the larger spinning spools which are being employed in spinning large packages of yarn.

The primary object of the present invention therefore, is to provide an improved hand manipulated dofling tool particularly adapted for use in connection with the extra long spinning spools such as the 14" size for collecting large packages of yarn.

A further object is to provide a tool which enables an operator to easily handle the relatively heavy spinning spools of this type, particularly in their wet stage.

A still further object is to provide a tool which is simple in design, cheap from the standpoint of materials employed and ease of manufacture, and which can be handled by an" operator with one hand in a facile manner. Further objects and advantages of the invention will be apparent from the drawing and descriptions thereof.

In the drawing Fig. 1 is a perspective view of a preferred form of dofling tool constructed in accordance with the present invention.

Fig. 2 is an elevational view with the spinning spool in cross-section and showing the tool of the present invention being inserted in the spool in its relaxed condition with the hand of the operator being shown in broken lines.

Fig. 3 is a view similar to Fig. 2 but showing gripping pressure being exerted on the hand holding portion of the dofling tool so as to expand the contacting surfaces associated therewith against the inner periphery of a spinning spool.

Referring now in more detail to the drawing Fig. 1 shows a preferred form of the invention which is generally designated at 5. In its preferred form, the tool is of one piece construction of resilient material such as rubber. In order to provide the device with suflicient strength the rubber should be of about the flexibility commonly employed in connection with automobile tires. While rubber is the preferred material due to its ease of workability, and other inherent properties such as resistance to corrosion, it is to be understood that other materials such as spring steel may be likewise employed.

As previously pointed out, the tool 5 is of one piece construction having the cut-out portion to provide the compressible flexible segments 14 and 16. Segments tactingisurfaces -7 and 9, whiclrtin the preferred'lform ofr'the-iinvention :are provided with i the treads" 1'2L on the face thereof. However any a frictional surface such; =as

finely rdivided: sandi :may: be incorporated the rubber at-zthisrpointin lieu of 'the treads 12 to' provide gripping :conta'ct with .th e spool;.=particu1arly-whenthe spools-are wet.

In operation, the operators hand 22 encircles the hand gripping portion provided by the segments 14 and 16, whereupon the device may be inserted into the inner periphery of the spinning spool 18 without the necessity of using the other hand. For even distribution of weight it is desirable to insert the tool as close to the center of the spool as possible and when in this position the operator need only squeeze the tool as shown in Fig. 3 to thereby expand the contacting surfaces 7 and 9 into frictional contact with the inner periphery 20 of the spinning spool 18. A firm grip is obtained and the spool may be simply and expeditiously removed from its spinning mandrel, even with a large package of yarn in its wet stage disposed thereon. While a preferred embodiment of the invention has been shown, it i to be understood that changes or variations may be made without departing from the spirit and scope of the invention as defined by the appended claims.

Having now described the invention, 1 claim:

1. A dofling tool comprising a plurality of resilient contacting surfaces adapted for frictional engagement with the internal periphery of a spinning spool, spaced connecting members constituting a flexible hand grip integral with and supporting said contacting surfaces, said hand grip being capable of compressional distortion when gripped by the hand, said tool having dimensions so as to permit its ready insertion within a spinning spool with said contacting surfaces being movable into frictional engagement with the inner periphery of said spool by means of compressional pressure applied to said hand 2. A flexible dofling tool, comprising a plurality of resilient contacting surfaces adapted for frictional engagement with the internal periphery of a spinning spool, spaced connecting members comprising a hand grip disposed between said contacting surfaces, said contacting surfaces being movable into contact with the inner periphery of said spool by means of gripping pressure applied to said hand grip, said tool having dimensions so as to permit its ready insertion and removal from within a spinning spool in its relaxed condition.

3. A doting tool comprising a pair of resilient flexible contacting surfaces adapted for frictional engagement with the inner periphery of a spinning spool by means of a pair of spaced flexible connecting members disposed between said contacting surfaces, said tool having dimensions so as to permit its ready insertion within a spinning spool without contact therewith, with said contacting surfaces being movable into contact with the inner periphery of said spool in response to pressure applied to said connecting members.

4. A dofing tool suitable for use in connection with extra long spinning spools which comprises resilient flexible contacting surfaces for frictional engagement with the inner periphery of a spinning spool, a compressible hand gripping portion disposed between and connecting said contacting surfaces, said compressible hand gripping portion being adapted to press said contacting surfaces into contact with the inner periphery of a spinning spool, said tool having dimensions so as to permit its ready insertion and removal from a spinning spool when in its relaxed condition.

5. A doflingtool comprising a pair of resilient flexible contacting surfaces adapted for frictional engagement with the inner periphery of a spinningspool, a pair'of flexible spaced connecting members joining said. surfaces and constituting a hand gripping portion, said contacting surfaces being movable into contact with the inner periphery of va spinning spool by means of gripping-pressure applied to said hand gripping portion, said tool having dimensions so as to permit its ready insertion and removal from a spinning spool in its relaxed condition.

6. A device adapted to be inserted into a spinning spool for lifting said spool together with the package periphery of a spinning spool upon being moved into contact therewith, said device being so dimensioned as to permit its insertion and withdrawal from said spool without contact with said spool in its relaxed condition.

References Cited in the file of this patent UNITED STATES PATENTS Prouty Feb. 11, 1873 Lefller July 22, 1952 

